Catalytic pyrolysis of biodiesel surrogate over HZSM-5 zeolite catalyst
| Autor: | Lidong Zhang, Yi Liu, Lei Wang, Chengcheng Ao, Wei Zhao, Beibei Feng, Jing Liu, Siyu Qian, Yitong Zhai |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Biodiesel
Chemistry Thermal decomposition Ketene Catalytic combustion 02 engineering and technology Activation energy 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Catalysis chemistry.chemical_compound Organic chemistry Methanol Physical and Theoretical Chemistry 0210 nano-technology Pyrolysis |
| Zdroj: | Chinese Journal of Chemical Physics. 34:102-111 |
| ISSN: | 2327-2244 1674-0068 |
| DOI: | 10.1063/1674-0068/cjcp2004043 |
| Popis: | To obtain insight into the catalytic reaction mechanism of biodiesels over ZSM-5 zeolites, the pyrolysis and catalytic pyrolysis of methyl butanoate, a biodiesel surrogate, with H-type ZSM-5 (HZSM-5) were performed in a flow re-actor under atmospheric pressure. The pyrolysis products were identified and quantified using gas chromatography-mass spectrometry (GC-MS). Kinetic modelling and experimental results revealed that H-atom abstraction in the gas phase was the primary pathway for methyl butanoate decomposition during pyrolysis, but dissociating to ketene and methanol over HZSM-5 was the primary pathway for methyl butanoate consumption during catalytic pyrolysis. The initial decomposition temperature of methyl butanoate was reduced by approximately 300 K over HZSM-5 compared to that for the uncatalyzed reaction. In addition, the apparent activation energies of methyl butanoate under catalytic pyrolysis and homogeneous pyrolysis conditions were obtained using the Arrhenius equation. The significantly reduced apparent activation energy confirmed the catalytic performance of HZSM-5 for methyl butanoate pyrolysis. The activation temperature may also affect some catalytic properties of HZSM-5. Overall, this study can be used to guide subsequent catalytic combustion for practical biodiesel fuels. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|